This is the latest official version of the Wattkins Universal PCB (v1.2). It replaces the original Tweed 5E3 PCB, that was designed by Terry Stinger, that was previously available from ppwatt.com.
When we say Universal PCB, we really mean it. This PCB was designed to include all the popular variations and mods from the 5E3 PCB plus some! It was created with all the traditional 12AX7/12AY7/6V6/6L6 circuits in mind, but it's engineered to work in just about any situation you can think of. While the board itself is limited to 4 tubes, it'll handle the majority of tube amp layouts whether they are single-ended or push-pull. Just check out the following features:
- Designed for the Wattkins Universal Chassis and Junior Chassis
- Fits the Mk3 Valve Junior chassis with chassis modification.
- Support for 12AX7, 12AY7, 5751, EF86 and more in V1
- Supports alternative heater/filaments layouts on pins 4/5 & 9 or 4 & 5 in V1 & V2
- Allows use of cheaper Russian pre-amp tubes such as 6N2P & 6J32P
- Optional MOSFET (i.e. IRF830) cathode follower for V1
- Choose between Paraphase, Cathodyne, or Long Tail Pair phase inverter
- Choose between cathode or fixed bias
- Optional tremolo support
- Will also work with the following 9-pin combined Pentode/Triodes:
6678 6LN8
6AX8 6LX8 6CM8
6BL8 6MG8 6KZ8 6AN8(A) 6EA8 6MQ8 6CS8
6GH8(A) 6U8(A)
6GJ8 7687
6HL8 ECF80
6JW8 LCF80
6KD8 ECF802
6KE8 LCF802
6LM8 ECF82
6CR8
6AB8 ECL80
It's also RoHS compliant.
We are the only official licensed supplier of this PCB. All proceeds from the sale of this PCB go directly to the running and maintenance of Wattkins Amp Forums.
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